1. Advanced Biomedical Research Institute, Ewha Womans University Seoul Hospital, Seoul, Korea.
2. College of Nursing, Ewha Womans University, Seoul, Korea.
3. Department of Preventive Medicine, College of Medicine, Graduate Program in System Health Science and Engineering, Ewha Womans University, Seoul, Korea.
4. Clinical Trial Center, Mokdong Hospital, Ewha Womans University, Seoul, Korea.
5. Department of Preventive Medicine, College of Medicine, Ewha Womans University, Seoul, Korea.
6. Department of Preventive Medicine, Korea University College of Medicine, Seoul, Korea.